I just found out that my step-sister is inviting her boyfriend and his 3 kids to our wedding. (Which is totally fine, but a heads up would’ve been nice ha!) But it’s getting a little sticky with the rehearsal dinner because they obviously weren’t on my MIL’s original list. I was already including her and her three kids for the dinner, but now should I include her boyfriend’s three kids as well (all teenagers).
I’m okay with it, but my mom suggested that since I don’t know them and they aren’t technically wedding party that we don’t include them. But that feels rude to me.
What do do you think?